Journal
GEODYNAMICS & TECTONOPHYSICS
Volume 11, Issue 3, Pages 624-631Publisher
RUSSIAN ACAD SCIENCES, SIBERIAN BRANCH, INST EARTHS CRUST
DOI: 10.5800/GT-2020-11-3-0495
Keywords
glacial lake; varved clay; SR-mu XRF scanning; climate reconstruction; seismic event
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Funding
- RFBR (RF Ministry of Education and Science) [18-55-53016, 19-05-50046, RFMEFI62119X0022]
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Core samples taken from the bottom sediments of the glacial Lake Kucherla (Gorny Altai, Russia) clearly show annual layers represented by glacial clays. In our study, age-depth modeling is based the varve chronology and Cs-137, Pb-210 and C-14 isotope data. Our model is a highly accurate and reliable demonstration of the annual sedimentation history within the past 1400 years. The time series of geochemical indicators of climate change were obtained by synchrotron radiation micro X- ray fluorescence (SR-mu XRF) core scanning. Instrumental meteorological observations from 1940 to 2016 were used to construct transfer functions for the average annual temperatures and atmospheric precipitation amounts. A geochemical trace of a catastrophic seismic event, the Mongolian earthquake of 1761, was found in the cross-section of the bottom sediments.
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